GENERAL

Acceptance of rapid-setting concrete patching
materials will be on the basis of approved brands and satisfactory test
results. These materials are approved for use when the plans and/or
specifications permit their use for surface patching purposes.

Brand names must be identifiable on the
packages. Material shall be packaged in a multi-wall moisture resistance paper
bag. Shelf life shall be indicated on each packaged bag (by expiration date).
Mixing sequence and addition of mixing water for each material shall be as
directed and recommended by each manufacturer. When coarse aggregate is used,
its type and quantity shall
follow manufacturer recommendations and a minimum of Class 2 durability rating.
Approved manufacturers and brands of
rapid-setting concrete patching materials are listed in the Materials Approved
Products Listing Enterprise (MAPLE) as Appendixes A and B for two types of
applications.

APPROVAL

To obtain approval of a
rapid-set concrete patching material, the manufacturer shall submit the
following items to the Office of Materials in Ames:

1. Product identification including brand name,

2. Complete manufacturer's recommendation for usage,

3. A copy of test report for the submitted product
from the National Transportation Product Evaluation Program (NTPEP), and

4. A current Materials Safety Data Sheet (MSDS).

Appendix A consists of rapid set patching
materials for pavement patching. Appendix B consists of shrinkage compensated
rapid set patching materials for dowel bar retrofit projects. Product approval is
based on satisfactory evaluation of the NTPEP test report. The minimum
requirements for approval are as listed in the following table. Magnesium
phosphate-based patching materials will not be allowed on Appendix B.

ASTM Test Method

Cure Time

Appendix A

Appendix B

Compressive
Strength,

MPa (psi) minimum

C 39 or C 109

3.0 Hours

24 Hours

7.0 (1000)

20.7 (3000)

20.7 (3000)

34.5 (5000)

Bonding, Slant
Shear

MPa (psi) minimum

C 882

1 day Lab cure

7 (1000)

7 (1000)

Durability, Method
A

or Method B

C 666

1 day air +

6-day soak in water

70% min.

(100 cycles)

90% min.

(100 cycles)

Shrinkage,

Length Change at 3
hrs

C 157

28 days in water

28 days in air

+0.15%

-0.15%

+0.15%

-0.05%

Chloride Content

0.0%

When permitted by the Office of Materials, the
test report from an authorized independent laboratory can be accepted for the approval
evaluation.

Products meeting the requirements of Appendix
B will also be placed on Appendix A.

Approval of a product may be withdrawn
because of deficient test results, inadequate documentation, and/or lack of
product identification.

CERTIFICATION

The manufacturer shall file a certification
at the beginning of each calendar year stating that the material supplied
during that year is identical with the formulation previously tested and
approved by the Office of Materials.

MONITOR SAMPLING & TESTING

The Office of Materials may sample and test
rapid-setting concrete patching materials to verify their capabilities of
meeting the approval requirements.